web-performance

Use this skill whenever the user is improving Core Web Vitals or page load performance, or mentions slow pages, PageSpeed Insights / Lighthouse failures, LCP/CLS/INP scores, bundle size, image/font optimization, or third-party script impact. Covers Core Web Vitals, image and font optimization, JavaScript bundle size, CSS build size, CDN caching, third-party JavaScript impact, and measurement tools. Skip for backend…